Michael is four years old. Sometimes he spends the weekend with his or her grandfather. He does not seem to remember a lot of what he does there. He can not always say what he had for breakfast or with whom he played. What is the most likely reason?

The weeks Michael spends with his or her grandfather are boring.

Michael has cognitive problems that should be evaluated

. Michael's memory is still developing.

Michael does not like talking to his or her mother.